Sawmill carriage



INVENTOR Patented Dec. 5, 1922.

2 SHEETS SHEET I.

ATTORNEY -H. C. HILKE.

SAWMILL CARRIAGE.

. APPLICATION FILED NOV. 22. 192ll,437,846.

Patented Dec. 5, 1922.

2 SHEETS-SHEET 2.

INVENT'OR: flew/y 6 52/41? ATTORNEY Patented Dec. 5, 1922.

newer-c. nrnnn, or sna'r'rnn, wrisnrne'ron.

SAWMILL CARRIAGE.

Application filedNcvember 22, 1921. Serial 1 lo. 516,92U.

This invention relates to power log shii't-i ing apparatus, and itsobject is the provision of simpleand efiicientdevices for use uponsawmill-carriages for controlling and Shiiting logs thereon.

The invention consists in the novel construction, adaptation andcombination of parts hereinafter described and claimed.

In the accompanying drawings,- Figure 1 1s a plan view llustratingsawmill apparatus including a carriage with devices embodying myinvention a plied thereto. Fig. 2 is a transverse sectional view takensubstantially through 2-2 of Fig. 1. Fig. 3 is a side elevation to anenlarged scale of one of the power cylinders, with thevalve 'asing shownin longitudinal section.

In said drawings, the reference numeral 5 designates, generally, asawmill carriage mounted on track rails, such as 6, and provided withtransversely arranged head blocks 7 upon which are mounted knees 8.These knees are advanced or retracted in unison by means of screws 9operatively connected to an operatingshaft 10 of suitable set works. Atoneside of the carriage track is a saw indicated by 11 and locatedbetween a log deck 12, shown only in 2,

anda system of rollers 13 which are shown in Fig. 1. Located below thelog deck 12 are transversely arranged skid bars lawhich are fulcrumed attheir ends remote from the track to chairs 15g and are supportedadjacent to their other endsby connecting rods 16 of power cylinders 17whereby the last named ends of the barsmay be elevated through slotssuch as 12 provided in said log deck.

All of the devices above referred to are or may be similar to what arenow employed in sawmill practice.

According to the present invention, I provide upon the carriage aplurality of transversely disposed power cylinders 18, two being shown,of the oscillating type having the trunnions, as 19, journaled inbearlngs 20 of frame bars 21 which are rigidly secured to thecarriageframe members 5 andb and constitute parts of the carriage.

Within the respective cylinders are pro vided pistons whose rods 22 arepivotally connected by pins 23 with the ends of arms 2-1 which arefulcrumed by pins 25 to the frame bars 21 in proximity with the innerside 5 of the carriage. i I

The arms 24 areiarranged so as to be swung through an arc of about 100,that is to say trom an approximately horizontal position to a short waybeyond a vertical position, the extreme positions of an arm arerespectively indicated dotted lines a' i and]; n 1g.

urthermore. the arms when in their retracted, or horizontal positions heentirely below the plane of the tops r headiblocks andin action protrudethereabove.

power ,medium. preierably compressed air, which is furnished to eitherends selectively oi the cylinders '18 through the medium or pipe lines.25 and 26 between the cylinder trunnions'19 and a valve casing 27 whichis also connected by a pipe 28 with a source or reservoir of thepowermedium.

Each of the cylinders 18 is provided interiorly withpassages asindicated by dotted lines 25 and 26 Fig. 3, affording communication fromthe respective pipes25 and 26 to the opposite ends, respectively, ofboth of said cylinders. The valve casing as illustrated-in 3 is providedwith a bore 29 having at aboutits midlength an inlet open ing 28 fromthe supply pipe 28. I

At opposite sides of opening'28 the casing is provided with ports 25?and26 which communicate withthe pipes 25 and-'26.- Also provided in thecasing are exhaust apertures 31 and 32 which are disposed between eachnication between either of the ports andv the adjacent exhaust aperturewhile permitting the flow of the power medium from the supply opening28? and the other of the ports. The valve is operatively connected as bya rod 35 with an arm 36 of a con- Said arms are actuated by any suitable.tion of a log as trolling post 37 which is rotatably moved as by meansof a handle arm 38.

When it is desired to elevate or swing the arms 24% from positions as aFig. 2 into the 5 position, the operator stationed on thesawmill-carriage 5 manipulates the post 37 to move the valve into theposition in which it is represented in Fig. 3,

l/V'th the valve thus disposed, the power medium admitted to the backends of the several cylinders project the piston-rods 22 outwardly toproduce appropriate move-.-

ments to the respective arms, the power medium from the other ends ofthe cylinders exhausting throughpipe line 26, and port 26 and aperture32 into external atmosphere.

To restore the arms 24 to their at positions, the operator regulatesthevalve to reverse the travel of the power medium as above explained toand from the ends of the cylinders.

The above described log shifting apparatus is employed mostadvantageously when the arms 2% are in their Z) positions to serve as abuffer to cushion the impact of heavy logs when being thrust from thelog deck onto the saw carriage to thereby relieve the latter, and moreespecially the knees 8 thereof, from jars or shocks. Another importantfunction of the apparatus is the rolling of a log, while upon thecarriage, into positionsto have slabs sawed therefrom to produce what isconventionally known as a cant in the manufacture of lumber.

Such log rolling is most conveniently accomplished by operating mydevices in conjunction with the skid bars 14 which are accordinglyraised shown in Fig. 2 to present an abutmentor stop for the lower por-B, for example, in turning the same by means of the arms Anotherfunction of the apparatus is the pushing of slabs from the carriage inany position of me earriage, and for transferring cants or sawed lumberfrom the carriage to the rollers 13 when the carriage is opposite thesame. Still other important uses of the apparatus whether usedindependently of or in conjunction with the knees 8, log handlingdevices, etc, will it is thought, be apparent to sawmill operatives.

In addition to the advantages above referred to afforded by my inventionin controlling logs, cants, etc, it obviates the relatively slow andlaborious use of hand tools such as pickaroons, peevies, or the like,which have hitherto been utilized for such purposes.

What I claim, is,

1. The combination with a sawmill-carriage provided'with head-blocks, ofdevices adapted to be used interchangeably for work shifting and bufferpurposes and carried on said carriage intermediate adjacent headblocksthereof, said devices each comprising an arm pivotally connectedadjacent to one of its ends to the carriage, fluid actuating powersmeans connected to the other end of the respective arm, and means forregulating the action of the aforesaid power means whereby said arms aresimultaneously moved into and out operable positions selectlvely.

2. The combination with a sawmill-carriage, of a plurality of armspivotally connected at one end of each to the carriage adjacent to itsinner side, power cylinders provided on the carriage, piston rodsextending from said cylinders and connected to the respective arms, andmeans including valve devices whereby a fluid power medium is supplied.to and exhausted from opposite ends respectively of all of saidcylinders to cause said arms to be moved into or from their operablepositions selectively.

3. The combination with a sawmill-carriage provided with head blocks, oflog turning and shifting devices mounted upon the carriage, said devicescomprising a plurality,

. HENRY C. HILKE. Witnesses PIERRE BARNES,

M. G. SUPPLE.

